diff --git a/controlstream.go b/controlstream.go
index f53ff0f..8093e7e 100644
--- a/controlstream.go
+++ b/controlstream.go
@@ -105,9 +105,6 @@ func (s *controlStream) sendPkt0() error {
 	if err := s.common.send(p); err != nil {
 		return err
 	}
-	if err := s.common.send(p); err != nil {
-		return err
-	}
 	s.authSendSeq++
 	return nil
 }
diff --git a/pkt7.go b/pkt7.go
index 6667672..06008a1 100644
--- a/pkt7.go
+++ b/pkt7.go
@@ -94,9 +94,6 @@ func (p *pkt7Type) sendDo(s *streamCommon, replyID []byte, seq uint16) error {
 	if err := s.send(d); err != nil {
 		return err
 	}
-	if err := s.send(d); err != nil {
-		return err
-	}
 	return nil
 }